Workmanship

Wiring

Universal to oxygen sensor's harness (wire-cut required)

Adjustment

Heater adjustment required. Signal adjustment not recommended.

Working Theory

A popular alteration amongst performance enthusiasts is to remove, gut or hollow the catalyst or to install an aftermarket header, to free the horsepower of the vehicle. Nowadays, vehicles are fitted with two up to four exhaust gas oxygen sensors, at least one precat exhaust o2 sensor that controls the fuel management system, and at least one downstream that monitors cat function. When the aftermarket headers are installed or catalytic converters are eliminated, the result is a catalyst efficiency below threshold ECM code indicating that the cat converter is missing or not working properly. The modified engine now produces a larger amount of exhaust gases than allowed. Obviously you do not want to drive your Hummer H2 with a constant service light, besides your vehicle will not pass smog test in many areas with an illuminated CEL. The only solution is to install an Hummer H2 O2 simulator wired up to the aftercat lambda probe’s harness in order to mimic a properly working exhaust air fuel sensor. It supplies the ECM with mimic, fluctuating voltage signal and overwrites the Electronic Engine Management into thinking the emission is normal. This Hummer H2 oxygen sensor simulator will allow you to run without catalysts and still keep the CEL off.

When check the engine light is triggered, the engine runs in ECU safe / limp mode, which is tantamount to restricted output and ruined fuel mileage. This Heated Hummer H2 O2 Sensor Simulator eliminates up- and downstream sensors as well, fulfilling the prerequisite of sensor type, thus you can get rid of frustrating service engine soon light. Magnum Oxygen sensor simulator is available to all vehicles on which the emissions are monitored through a 1 up to 4-wire narrowband zirconia lambda probes working in a 0 up to 1.0 Volt fluctuating voltage range. It also features a standalone adjustable heater simulator circuit. Feel free to contact our engineers prior to purchase if you are unsure about your Hummer H2's sensor type. Magnum Oxygen sensor simulator cures all lean mixture and other exhaust air fuel sensor related trouble codes caused by heavy exhaust modifications. Dual exhaust with 2 downstream lambda probes requires two O2 sensor simulators. Our digital O2 Sensor Simulator is adjustable, allowing you to adjust the AFR within a certain range that is still accepted by the ECM. You can now completely eliminate the zirconia narrowband type exhaust gas oxygen sensor.

Note

front lambda probe has to work flawlessly. Slow signal of front o2 sensor may prevent the oxygen sensor emulator from working. Headers require both up- and downstream Oxygen Sensor elimination. In case of a single lambda sensor or dual pipe exhaust system fitted with 2 oxygen sensors only, the oxygen sensor simulator wires into these exhaust gas oxygen sensors. Oxygen sensor simulator is a racing part. It is not CARB approved. Please be aware of the bylaws and regulations, O2 sensor eliminator is not street legal in several US states and countries.

Are you boring on the marketing hypes for $5 oxygen sensor simulators, intelligent O2 sensor simulators, o2 sensor extenders and those oxygen sensor bypass gadgets that will fail to work by all means? Here you’ve stumbled upon the right solution at the right place. without skepticism, this oxygen sensor emulator will fit your Hummer H2. and rid you of the lambda probe related check engine light. Although it will cost you more than a penny, the worry-free setup and the warranted results are worth the dollars.

Compatibility - Rule of thumb Don’t want to waste your time installing oxygen sensor bypass gadgets that will never rid you of the ECU warning light for good? Choose the reliable solution that will surely resolve your service engine soon light issue rite away. These O2 Sensor Simulators are made to prevent the CEL from illuminating and to prevent an check engine light MIL code from triggering when the catalyst(s) are removed, gutted or hollowed. The Magnum Hummer H2 Oxygen Sensor Simulator is carefully calibrated to mimic the signal from the exhaust air fuel sensor to keep it in the range the Powertrain Control Module is expecting to see.

Packing List

1 x Oxygen Sensor Simulator

4 x Bullet Connectors

4 x Heat Shrink Tubing

1 x Stainless Steel Washer

1 x Stainless Steel Nut

1 x Installation Instructions

How can I figure out my sensor is a zirconia type?

Zirconia type exhaust air fuel sensors have 1 to 4 wires. 1 to 3 wires indicate a zirconia narrowband exhaust o2 sensor definitely. In the case of 4 wires, 2 of the wires have to be identical for heater, whilst the rest two wires have to be different for signal sender and signal ground. Always reference the sensor-side colors of the wires coming out off of sensor head. ECU-side colors may convert through the plugs.

How to find out if it's a narrowband or wideband?

Typically 1 to 4-wire oxygen sensors are narrowband. There are exceptions though. A narrowband oxygen sensor's signal is constantly fluctuating in a range of 0 to 1.0 Volts depending on oxygen content in the exhaust gas. Any oxygen sensor that produces higher voltages, is determined to be a wideband oxygen sensor. Keep in mind, although a 4-wire O2 sensor can be wideband too, in common sense only 5 or 6-wire sensors are called wideband. If your O2 sensor has more than 4-wires, oxygen sensor simulator is not applicable.

Which sensor has to be tricked?

In general: the downstream but upstream has to work flawless in full range. If you intend to buy a simulator hence decatting, header or modified exhaust, the downstream sensor has to be fooled by all means. See position diagram Headers or precat gutting requires upstream simulator as well.

Questions and answers

Can I be positive this chip fixes my CEL issue for good and all?

Yes, Magnum oxygen sensor simulator produces a random fluctuation having assigned with suitable cycle and wave accepted by the ECU. Rest assured, all oxygen sensor related codes will be gone. Upstream sensor if any has to be in good condition though. Please see prerequisites pertaining to sensor type and quantity of simulators.

What if I simply eliminate factory oxygen sensor?

Oxygen sensor removal will not remedy CEL issue. Suitable fluctuating signal is fundamental to be delivered by the ECU. Zero volt signal triggers another trouble code.

Why is it so important to cancel the trouble code?

While check engine light is on, ECU restricts the engine performance and vehicle is running in safe / limp mode. MPG is also affected negatively.

Do I need to buy this heated simulator or I can stick with cheaper EZ CEL Fix?

If you can use the heater of the factory oxygen sensor(s), you may wire up #795 EZ CEL Fix. This heated simulator #661 allows you to remove or eliminate the stock oxygen sensor completely.

What about 'oxygen sensor bungs' 'mini cats' or any other piggybacks are also supposed to sort our FI problems?

The market is teeming with physical gadgets aiming to fix CEL issues. Vast majority of them doesn't take effect on OBDII vehicles made after 1996. They often don't work even on early fuel injected cars. If your vehicle had been manufactured after 1996 or you drive an early model controlled by a sensitive ECU, these gadgets won't help. The definite solution is a circuit conditions realistic signal, as if a working oxygen sensor would be screwed in the factory exhaust.

Can I rally my two harnesses into one simulator?

No, simulators can't be spliced. Get rid of oxygen sensor related CEL issue yet today. Flat catalytic converter gutting or plain-tube decats will spoil low- and mid-end torque hence ruined engine flush due to inadequate exhaust back pressure and higher block temperature thus valves, cylinder head and other engine parts are constantly being exposed to undesired extra heat. True enough, maximum horsepower increases it still pertains to a higher RPM which perishes dynamic kick out acceleration throughout the RPM range, mostly on automatic vehicles, therefore to save money on fuel and enhance low and mid-end torque, highly recommended to install a reliable Decat . Plain decatting is judged unprofessional among serious tuners and enthusiasts. Injected gasoline engines controlled by Electronic Control Unit (ECU) or alias Electronic Control Management (ECM) have oxygen sensor or O2 sensors to measure the amount of oxygen contained in the exhaust gas. These sensors deliver the ECU fluctuating voltage according to the actual oxygen consistence of air fuel mixture. When exhaust system is decatted or heavily modified, ECU is reading an oxygen sensor signal being inconsistent with other engine sensor's signal, or signal is out of the range yet accepted, an O2 sensor-related trouble code will be triggered ending up in check engine light issue. CEL or MIL or FI errors abbreviate these failures. While check engine light is on, ECU runs in so called lean limp mode. Safe mode restricts both the fuel trim and the ignition timing and develops an overall limitation on performance, until problem diagnosed and resolved definitely. Therefore if you modified your engine with any upgrade causes the oxygen sensor deliver lower signal than normally, you need to wire up an Oxygen Sensor Simulator. Although your ECU will be tweaked, mixture's air fuel ratio still will remain incorrect hence decatting or any other exhaust modification. Simulators help you remedy CEL problems but will not achieve that basic remapping is crucial when decatting or modifying an exhaust. You might be interested in our further performance chips in order to boost engine horsepower, improve fuel efficiency or both at the same time. EVO-Tech, Dyno-Boost and Smart-Tune-X fuel controllers remap the ECU in order to reprogram the engine management to the performance parts preinstalled on the vehicle. They boost the engine horsepower as well as improve fuel mileage. Magnum Tuning has been dealing with manufacture of performance upgrades since 1994. Our experience warrants peak performance, reliability perfect style. Simulators are made in Europe covered by 10-year warranty. Claims stated in this description are warranted by Magnum Tuning. Oxygen Sensor Simulators are not CARB Approved, and are never to be used on Pollution Controlled Vehicles or on Public Highways in those states and countries simulators are prohibited. Customer agrees and takes responsibility NOT to install the Oxygen Sensor Simulator in order to pass federal or other emission test or to treat check engine light also referred to as CEL/MIL issues.

Please read instructions before installation.

REQUIRED SKILL: Basic mechanical and electrical skill (wiring, crimping or soldering, amper-test) REQUIRED TOOLING: Hand tools required (multi-meter) ESTIMATED TIME OF INSTALLATION: 30 up to 60 minutes. Installation is Do-It-Yourself. Our easy to follow, the step-by-step instructions will guide you through how to install your oxygen sensor simulator in an hour or less, even if you are not excessively inclined in tuning or hobby gadgeteering. It's fundamental though, being able to identify engine sensors and to establish electronic connections. As a manufacturer for over 22 years we have been standing behind our product line supplying our Customers with full Tech Support 7 days a week via emails. Our certified mechanics who are actively involved in racing and high performance tuning are eager to assist you.

Wiring

Cut the harness of the oxygen sensor.

See colors operations of each wire in car wiring diagram or search for your combination in the table below.

Connect the proper wires with terminals or solder them in place. (Hydrochloric acid recommended if soldering.)

Contact the red cable of the red/black dual wire to the ignition feed + 12V, and the black to the engine frame or battery negative.

Mount the unit to any fixture as far from heat as possible. Lowest temp recommended.

No heater test required in case of 2-wire sensors.

Heater adjustment

Heater adjustment is required if heater related CEL code is tripped after installation. This is not uncommon.

Heater dial can be determined with an Amper-test. Take a multi-meter and turn it to AMP mode. Contact the stock sensor's one wire to the battery negative terminal, the red lead of multi-meter to the battery positive and black lead to the other heater wire. Wait 10 seconds until heater warms up (cold and hot amp readings differ) and check the AMP reading. Take note of it. Repeat the same test with the simulator and set the same AMP reading by dialing screw#2. Wire up simulator’s heater wires to the vehicle’s heater harness afterwards. Please see the diagram below.

This O2 Sensor Simulator is available to 1 up to 4-wire zirconia narrowband type oxygen sensors only. 5 or 6-wire wideband, titania or 4-wire wideband sensors are not applicable. Uncertain which part to pick? Contact our Tech Support .

The difference between front and post sensor’s voltage is also monitored. If deviation is excessive, an error code might be triggered on the downstream pier, even though the issue is not caused by the downstream sensor. Upstream sensor also can be slow or stuck, so downstream sensor has to be in mint condition.

Usually aftermarket header ruins the upstream oxygen sensor signal. If so, upstream sensor has to be eliminated as well.

Flat catalytic converter gutting or plain-tube decats will spoil low- and mid-end torque hence ruined engine flush due to inadequate exhaust back pressure and higher block temperature thus valves, cylinder head and other engine parts are constantly being exposed to undesired extra heat. True enough, maximum horsepower increases it still pertains to a higher RPM which perishes dynamic kick out acceleration throughout the RPM range, mostly on automatic vehicles, therefore to save money on fuel and enhance low and mid-end torque, highly recommended to install a reliable Decat .

Plain decatting is judged unprofessional among serious tuners and enthusiasts.

Although Magnum O2 Sensor Simulator makes you enable to adjust the air fuel ratio within a certain range, basically it is not intended to remap the fuel trim. If you are about to override the factory lean fuel programming or you want to optimize the potential of your exhaust upgrade, feel free to check out our fuel controllers .

Oxygen sensor eliminator has to be powered on ignition feed DC 12V. Never connect hot wire to constant battery voltage. This wiring may lead to battery drainage also may fry the circuit.

Smog test result depends on the criteria of your local emissions inspection. Simulator is neither supposed to improve emissions spoiled by an aftermarket pipe or any other upgrade, nor restore factory emissions required for a smog inspection. It is solely intended to help you get rid of ECU safe mode triggered by check engine light issue. It will not allow you to preserve factory emissions level. Simulator tricks the computer delivering mimicked signal is accepted by the ECU but it can’t purify the fume electronically. Cat is intended to attain that physically. Even though restoring of ECU to normal mode from safe mode improves emissions partially, if converter is gutted, worn or defective, original emissions can be preserved by no means.

The simulator is waterproof but not submersible.

Oxygen sensor simulator's signal is set to factory 0.9…0.95V top voltage. Don't adjust signal related screw#1 until CEL issue is resolved. Basically screw#1 should not be dialed unless you want to modify air fuel ratio. We don't bear responsibility for CEL shut down, if signal is not set to the top voltage above.

Color response chart refers to sensor-side colors.

Oxygen sensor simulator is a racing part. Oxygen Sensor Simulators are not CARB Approved, and are never to be used on Pollution Controlled Vehicles or on Public Highways in those states and countries simulators are prohibited. Customer agrees and takes responsibility NOT to install the Oxygen Sensor Simulator in order to pass federal or other emission test or to treat check engine light also referred to as CEL/MIL issues.

get rid of MIL light for good

Shipped super fast fairly well wrapped. Very easy to install. What it will do: it will get rid of MIL light for good and allows you to set richer mix which I am pleased about. MIL warns you when certain limit reached. What is does not do. I though it will change shift points but unnoticeable. Will not increase horsepower or fuel economy beyond the loss due to safe mode. What magnum can do: to keep up awesome tech support. So all the way it is worth the money with minor infirmities. I recommend this product.

excellent service follow up

I have had to contact Magnum Tuning on a few occasions for advice on connecting up my Dyno chip and Oxygen simulator On all occasions they have been extremely helpful and made the job easy I would recommend Magnum Tuning to anyone wanting performance chips

it rectifies MIL

Ordered based off research I've done, hoping to better my gas mileage a bit as it rectifies MIL and prolong the life of the engine not running in safe mode. I assure you, everything OK. Things to note for those thinking about ordering: They ship from stock and shipping was remarkably quick, it is free. The description is adequate; the picture shows the actual item, however, it doesn't show the sim inside. If you need more than one, order the quantity you require with that in mind.

cost effective way to rectify issue

Before I purchased my unheated o2 simulator I should have read other reviews and part description that says OEm sensor must be kept in the exhaust screwed in. Did not blame magnum, absolutely my bad. They still traded in and replaced my simulator. Excellent service and cost effective way to rectify issue with clogged cat converter.

Unleash the max performance potential of your vehicle and say goodbye to lean factory fuel programming with this adjustable fuel controller. Your performance chip tunes your engine with advanced fuel programming to harness your engine’s full power. The fuel tuner will add 15 % extra horsepower to your power plant without compromise of engine durability or reliability. Chip tricks signals being read by the ECU, resulting an adjustment to fuel curve, which is what causes increase in power, acceleration and throttle response across the RPM range.

Are you chasing after heaps extra horsepower? Augment the performance potential of your vehicle and say adios to lean factory fuel programming with this fuel controller. Extract race-inspired performance out of our performance chip box and save big bucks on fuel as a positive side-effect. If you decided to harness your vehicle’s full performance potential, get a heck of lot more power with this fuel tuner and remap the fuel trim in a blip.

With our ECU controller, your fuel maps receive an extensive recalibration that delivers horsepower and torque down to the wheels. The performance chip works to optimize the fuel trim for ultimate power and better fuel mileage. Smart Fuel Tuner fools engine sensor signals being read by the ECU, resulting in an adjustment to the fuel curve which causes the increase in power as well as improves acceleration and smoothes out throttle response through the RPM range.

Hummer H2 O2 Sensor Eliminator

Upgrade your H2 engine with a unique Hummer Oxygen sensor bypass. Welcome to tune up town! O2 Sensor Simulator is a must-have if you are a Car, Truck SUV tuner or an enthusiast or just want to tune up your factory Hummer H2. Backed by our 17-year experience in manufacturing we run 7-day Technical Support for all Buyers. Installation instructions provided in the package. This Oxygen sensor bypass installed on your H2 Car, Truck SUV will make your driving power /because this O2 sensor eliminator resolves O2 sensor related MIL, CEL issue resulted by modified or aftermarket exhaust/ much better and you will feel the considerable increase in fuel efficiency /after O2 sensor trouble code cancelled/. O2 Sensor Simulator will also positively affect the HP /while getting rid of MIL, CEL issue/. Although there are a few different types, for the most O2 sensor simulator /is supposed to cure Oxygen sensor CEL trouble codes/, installing a Hummer O2 Sensor Simulator could not be any easier. This H2 upgrade installs to the stock O2 sensor and let it work its magic through the oxygen sensor signal and heater resistance of your Car, Truck SUV. We received the following opinion from Sergio, WOW the best and smoothest deal that I ever made on the net, thanks, you are great. My O2 sensor simulator /is supposed to cure Oxygen sensor CEL trouble codes/ works like a champ. My Hummer runs like a pro. This Oxygen sensor bypass is worth the money. Once again your excellent technical assistance service is much appreciated!